水落石出 [- - shí chū]When the water subsides, the rocks emerge.; Doubts will clear up when the facts are known.; reach the bottom of sth; The time will come to reveal the whole truth.; The whole thing comes to light.; When the water ebbs, stones will appear.:
•¶ 她起了疑惑, 便决定弄个水落石出。 She got suspicious and decided to get to the bottom of it.